CD79A and diabetes mellitus: A prospective, single-center, longitudinal cohort study in Israel, has demonstrated that diabetes is significantly associated with lower concentrations of IgG antibodies (OR: 0.92; 95% CI: 0·39–2·19; p = 0·855) and non-reactive response of IgA antibodies (OR: 0.30; 95% CI: 0.13–0.73; p = 0.008) after BNT162b2 COVID-19 vaccination (37).